Combined typewriting and computing machine



H` L. PITMAN. COMBINED TYPEWIIITING AND COMPUTING MACHINE.

APPLICATION FILED JUNE 25, 1917. RENEWED APR.3I1920. 1,360 145, Patented Nov. 23, 1920.

l/I///Iesses: WMI/enfer.- MM by @0% H. L. PITMAN.

COMBINED TYPEWRITINQ` AND COMPUTING MACHINE. APPLICATION man 1uNE25. 19H. RENEWED APR. 3, 1920.I

l1 ,360, 145, I Patented Nov. 23, 1920. N

4 SHEETS-SHEET 2 H. L. PHMAN. y COMBINED TYPEWRITING AND COMPUTING MACHINE.

APPLICATION FILED JUNE 25; 1912. RENEWED APH-3,1920.

4 SHEETSSHEET 3.

'/m/enfof: 5%

Patented Nov. 23, 1920.

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H. L. PITMAN. COMBINED TYPEWRITING AND COMPUTING MACHINE. APPLIcATIoN FILED JUNE 25. 1911.- RENEWED APR. s, 1920.

Patented Nov. 23, 1920.

4 SHEETS-SHEET 4.

UNITED s'ra'res"YYY PATENT oFFIclaz.4

HENRY L., PITMAN, OF 'EAST ORANGE, NEW JERSEY, ASSIGNOR TO UNDERWOOD COM- PUTING MACHINE COMPANY, OF NEW YORK, N. Y., A CORPORATION 0F NEW YORK.

COMBINED VTYPEWRIIINGr AND COMPUTING MACHINE.`

Specification of LettersPatent. I Patented NOV. 23 1920.

Application iled .Tune 25, 1917, Serial No. 176,676. Renewed April 3, 1920. Serial No. 371,139.

To LU/whom it 'may concern:

Be it known that I HENRY L. PrrMAN, a-

citizen of the United States, residing in East Orange, in the county of Essex and State of New Jersey, have lnvented certain new and useful Improvements in Combined riage, and thus for the traveling element,

to give an extra step movement after ,writing the last digit in each group, that is, after writing in units of millions, units of thousands and units of dollars.

To do this, the traveling element is provided witha series of properly spaced cams, which operate when the traveling element comes to its proper positions to remove an obstructing arm from the path of the loose dog of the escapement, so as to enable this loose dog to jump to the second succeeding tooth instead of the next succeeding tooth, as normal. In this way, the carriage has an extra step movement providing automatically for the punctuation space. In the present case,'the cams operate a one-way acting dog, so thatthemechanism will b e inactive during a return motion of the carriage, thus avoiding wear and tearand noise.

IVith this form of dog, I have arranged to connect the parts, so that when the carriage is back-spaced, after a double space movement thereof, the repositioning of the extrastep-producing mechanism, by means of the back-space mechanism, will be effected.

The shiftable stop member or blocking toe in the present invention normally permits single-space movements of the carriage. This'stop member is shiftable by the totalizcr to an effective position, thus permitting the loose dog of the escapement mechanism to strike against a second stop` to produce,

double-space or skipping movements ,of the carriage. The second stop l preferably make a fixed stop.

I preferably connect the shiftable stop memberwith the case-shift mechanism and the non-compute mechanism, so that when either the case-shift mechanism or the noncompute mechanism is actuated, the shiftable stop member will retain its normal effective position or, in other words, render the effect of the traveling totalizer ineffective on theshiftable stop member.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a vertical section, taken from front to rear, with parts omitted to simplify the showing.

Fig. 2 is a skeleton perspective View, showing the connection from the traveling totalizer to the escapement mechanism; the case-shift .mechanism and the computer silencing mechanism by which the foregoing connection may be broken; andthe connection of the back-space mpchanism for repositioning the space-skipping mechanism to insure correct operation thereof after a back-space movement.

Fig. 3 is a detail View, showing the computing mechanism silenced from the nonadd key with the disconnection of the double space or skip-controlling mechanism, which is brought about by a pivotal movement of a bell crank on the case-shift frame.

Fig.` 4 is a view of the parts shown inA Fig. 3, with the computing mechanism silenced from the case-shift mechanism with a corresponding silencin ofthe double'A space or skipping mechanlsm, the latterbeing brought about by the bell crank on the case-shift frame, but which, during a caseshift movement, moves integral with said frame.

Fig. 5 is a View showing the relation of the cams to the one-way acting dog during a normal advancing movement of the totalizer and of the carriage.

Fig. 6 is a detail view of the parts shown in Fig. 5, except that the carriage has advanced to a space preceding a punctuation space, so as to insure a two-space movement and a vskipping of the punctuation space with the writing of the digit. f Fig. 7 shows the 'traveling element ory totalizer after a digitv has been written and as having advanced two letter-spaces, thus bringing the cam, which was previously ,1nv engagement with the dog, clear of thel same.

Fig. 8 is a view bf the parts simllar'to Fig. 6, with the dog in proper position for a skip or jump movement, which position it may have obtained after a two-point backspace movement of the carriage from .the Fig. 7 position, in which case the dog had been moved clear of the cam and brought down on its yapex at the proper instant.

Fig. 9 is a view of the parts shown in Figs. 6 and 8, and with the traveling element in the same relative position, except that the carriage and totalizer were returned without an actuation of the back-space mechanism, so that there would not be a tendency to cause a double or skip movement ot' the carriage if a key `were to be operated at thistime.

Fig. 10 is a detail vertical section, showing in full and dotted lines two positions of the back-space mechanism, the lateral movement of the operating link being utilized for repositioning the space-skipping mechanism.

Fig. 11 is a horizontal section, showing the stop member or obstructing toe as 1n position to permit only a sin le-space movement of the carriage and t us of the totalizer.

Fig. 12 is a detail view in elevation of the typewriter escapement mechanism, showing the same in its normal position set for a single letter-space.

Fig. 13 is a view of some of the elements shown in Fig. 12 set for a single letter-space,

and shows the position of the parts after the escapement has been operated` thus carrying the loose dog clear of the esca-pement wheel and permitting it to advance to catchthe next succeeding tooth of the escapement wheel.

Fig. 1-1 is a view of the parts shown in Fig. 13, except that the mechanism is set for a skip or double-spacing, andthe loose dog has advanced a distance suiiicient to catch the second succeeding tooth of the escapement wheel from the one with which it was just-in engagement. Fig. 15 isa horizontal detail section of the escapement mechanism, showing the obstructing movable stop member or toe asin a position to limit the escapement action to but a single letter-space, the position of parts corresponding to that of Fig. 13.

Fig. 16 is a view similar to Fig. 15, except that the obstructing toe has been moved to a cleared position. permitting the loose dog to be arrested by a fixed stop on the escapement bracket. for -double-space action of the escapement mechanism.

Numeral keys 1 and alphabet keys 2 depress key levers 3 to rock bell cranks 4, so as to swing type-bars 5 up rearwardly against the front side of a platen 6 mounted to rotate on a carriage 7. The carriage 7 has a step-by-step movement under the control of an escapement mechanism. which lincludes a rack 8 pivotally mounted on the carriage 7 bymeans of arms 9. The rack 8 normally rests in engagement with a pinion 10 controlled in its rotation by an escapement wheel 11, which is connected to the pinion 10 by a pawl-and-ratchet mechanism 12, (Fig. 12). This pawl-and-ratchet mechanism permits an idle return movement of the carriage 7 and rack 8 relative to the wheel 11, but insures that the step-by-step advancing movement of the carriage shall transmit a corresponding rotation to the escapement Wheel 11.

The rotation of the escapement wheel 11. due tothe advancing of the carriage b v a spring barrel 14` (Fig. 2), is controlled by a 'fast dog 15 and a loose dog 16 mounted on a rocker 17. Normally, the loose dog 16 is in engagement with one of the teeth ot the escapement wheel 11 in the position shown m Fig. 12- and prevents rotation of the escapcment wheel and advancing movement of the carriage.

Nhen any of the character keys 1 and 2 are actuated, heels 18 on the type-bars 5 engage a universal rail 19 to force rearwardly a universal frame 20. The frame is floatingly supported by a rocker 21 at its rear end, and is connected to operate the rocker 17 on which the :tast dog 15 and loose dog 16 are mounted. By this arrangement, on the down-stroke of the numeral key, the loose dog 16' is moved out of engagement with the escapement wheel 11, and the fixed dog 15 brought into engagement with the same tooth of the escapement wheel 11 with which the loose dog was in engagement.

The loose dog 16- jumps forward, by means of a tension spring 22, a distance to enable either one or two space movements of the escapement wheel 11, according to whether a single letter-space or a double letter-space is desired. In order to see the reason for the double letter-space, it is first necessary Jco-describe the computing mechanism somewhat briefly.

The numeral keys 1, in addition to operating the type actions. operate the computing mechanism. For this purpose, each numeral key is provided with a cam 23. having cam slots 24 of a pitch or throw corresponding to the value of the associated keys. That is to say, the cam slots 24 are graded in their effective magnitude, starting with the l numeral key and increasing to the 9 numeral key. The cam slots. when their associated numeral keys are operated, rock a bail 25 corresponding amounts. The bail 25 is provided with a pin 2G normally, when the computing mechanisml is in action, engaging in a notch 27 provided in an interponent 28. The interpon'cnt is held thus connected to the bail 25 by means of a spring 29. The interponent is pivotally mounted on an actuator 30. which, when a numeral key is depressed, is rocked to draw down on a link 31, so as to rock a bell crank 32. The bell crank 32 is connected by means of a link 33, to thrust lforwardly a driven rack bar 34. The driven rack bar 34 is brought, at the termination of its rearward movement, into mesh with a gear 35 in a manner more particularly described and claimed in my application No. 24,390, filed April 28, 1915 y(now Patent No. 1,308,506, granted Julyl, 1919). n

The gear 35 is connected by a train of gears 36 to a master wheel 37. The master wheel is positioned so that computing wheels 38 come into register therewith step by step. The computing, wheels 38 drive dial wheels 39, so as to exhibit numbers on the dial wheels through a sight-opening in the casing of a`totalizer indicated at 40. The totalizer 40, of which, there may be one or more, forms a traveling element of the computing mechanism, and is adj ustably mounted on a truck 41, which in turn is connected to the carriage 7, so as to travel-therewith.

The traveling element of the computing mechanism, which is the totalizer 40, controls the extra spacing or skipping movement of the carrlage 7 and of itself. For this purpose, there is provided on the totalizer casing a plurality of cams 42, one for each punctuation space or skipping movement desired. They are located to correspond-to theprinting and computing in units of millions, units of thousands, and units of dollars. As the carriage and totalizer 40 travel in anormal letter-feeding direction, each of these cams cornes into engagement with a trip or dog 43 pivotally mounted on a lever 44. i

The dog 43 is arranged so that when the carriage and traveling element 40 are moving in a normal letter-feeding direction, the lever 44 will be rocked. When, however, the carriage is returned by hand in the usual way, the dog 43 will be rocked about its pivotvand the lever. 44 remain stationary (Fig. 9). golf this purpose, the dog 43 is' limited in it movement in one direction by a stop pin 45,1whi'ch will form of the dog 43 a follower, forcing the end of the lever 44, on which itis mounted, away by engagement with the cams 42. If the totalizer 40 is returning with the carriage 7, the dog 43 is rocked idly against the tension of a spring 46, which returns it to its normal position.

The rocking of the lever 44 by the cams 42, when coming into a skip-determining digit column, causes the lever to draw on a link 47, so as to rock a lever 48, which thrusts rearwardly a link 49 having a hook 50 mounted 1n an opening 51 in an arm 52. This movement will cause the arm 52 to rotate in a counter-clockwise direction against the tension of a spring 53, so as to swing an obstructing member 54 to a cleared position. That is to say. thev obstructing member has an obstructing or blocking toe 55, which is guided in a slot of a bracket 55 and normally lies in the path ofthe loose dog 16 (Figs. 13 and 15), so as to limit the j escaping movement thereof to a single letter- Vhen, however, one of the' space action. cams 42, as just described, swings this obstructing member 54, it moves the obstructing toe 55 to a position clear of the path of movement of the loose dog 16, permitting it to swing when released, until it comes into engagement with an auxiliary obstructing stop 56, fixed on the bracket 55a. This movepurpose, the parts of the obstructing member 54 overlap each other and are connected by screw-connections 58a, which admit of the adjustment.

The one-way acting dog 43 acts for movements in the normal letter-feeding direction to give extra jump or skipping movements of the carriage 7 and traveling totalizer 40, so as to leave blank spaces corresponding to punctuation spaces., It also will permit the idle passage of the cams 42 when the carriage is returned any considerable distance by hand. If a mistake should be made, however, in writing the last digit before a punctuation space, and it is necessaryto bring the carriage back to this digit space, the return movement of the cam 42A would merely rock the dog 43 idly, which is the condition of the parts shown in Fig. 9. Provision is therefore made, when back-spacing, to cause a proper relative adjustment of the dog 43 and the cam 42 with which it is in swinging movement at right angles to that of the rocker 58, so that when the rocker is swung forwardly to bring the pawl 60 into register with the rack 8, it will be in the position, by swinging in the plane of the rack, tofmove the same back a, letter-space a letter-space at a time.

at a time, and thus back-space the carriage To operate this mechanism, there is provided a back-space key 62, which, when depressed, rocks a key lever 63, so as to rock a shaft 64. The shaft 64 has an arnr 65 secured thereon, so as to draw down on a link 66. The link 66 is connected to one arm of the pawl 60 by a rigid angle piece 67, and to another arm of the pawl 60 by a spring 68. In this way, when the backspace key 62 is depressed, the pawl 60, `with the arm 59 on the rocker 58, will be first swung forward bodily until the movement is limited by the arm 59'; then the pawl 60 will be swung so as to engage the teeth oi' the rack 8 and back-space the carriage a single space at a time.

As stated above, the back-space mechanism is used to insure proper adjustment or repositioning of the cams 42 and the one-way acting dog 43. 1Y'hen the back-space mechanism is operated, the link 66, which it is drawn down on, also moves sidewise because of the particular direction of pull on thepawl 60 and the position of the pivot of the latter.F This sidewise motion ot' the link is taken advantage ot to rock the arm by engaging with a stud 69, located in the path of movement ot' the link 66 and zuljustably mounted on the arm 52. The arm 52, as before, transmits its movement to the obstructing member but this motion this time is for no particular purpose, as the escapement mechanism is not operated when back-spacing, but this motion is also transmitted in a sort ot' back action by drawing on the thrust link 49, which rocks the lever 48, to thrust forward the link 47, rocking the lever 44, soas to withdraw the dog' 43 clear of the cams This is the reverse of the operation in which the cams 42 insure a skipping or double-spacing movement of the escapement mechanism and serves the purpose of clearing the dog 43 from the cams 42, so that after back-spacing, the dog 43 will assume a correctposition with respect to one of the cams 42 if the back-spacing occurred at that point. This will insure the obstructing toe 55 being properly cleared to give an extra step movement if the position of the totalizer 40 warrants it.

In order that the computing mechanism may be silenced or disconnected manually, a, non-compute lever 70, when rocked forwardly, thrusts a link 71 pivotally connected therewith rearwardly to rock a disconnector 72 in a counter-clockwise direction. This disconnector overlies the interponent 28 and will force it out ot connecting relation with respect to the bail 25. This disconnection may also be controlled when writing uppercase characters which are not digit-s and do not require computing. The case-shift mechanism is ot the normal Underwood type. The platen 6 is mounted in a platen frame 73, which is mounted for a vertical movement, by\ swinging -arms 74. The platen frame moves by means of rollers 75 on a shift rail 76 mounted on a locking shift trame 77. The shift trame 77 is operated by one or two case-shift keys 78, which have, at their rear ends, arms 79 engaging in back of the case-shift frame 77. Connections between the case-shift-frame 77 and the disconnector 72, hereinafter described, enable actuation of the latter by the former during the movement to upper-case position, and, in order that such actuation may be effected independently of the non-compute lever 70, provision is made ot a connection between lever and link 71, comprising a pin 70a on the lower end of lever 70, projecting into a slot 71 in the forward end of link 71.

it will be seen that forward movement of the upper end of lever 70, when the parts are inthe positions shown in Fig. 1, will. actuate link 71 and disconnector 72, and that disconnector 72. and link 71 may be actuated without moving non-compute lever 70.

.Provision is also made whereby the mechanisrn which controls the skipping movement is silenced or rendered ineffective when the computing mechanism is silenced. This result may be obtained by means of a link 80, pivotally connected at one end with disconnector 72, and provided at its rearward end with a slot 80a, embracing a pin 81 on a bellcrank 82, carried on a pivot 84 on the shift-frame 77. The forwardly-extending arm 83 of the bell-crank 82 has a pin 85 engaging in a slot 86 in the link 49, and, by this connection, thelink 49 may be raised or lowered, to enable lost motion of the tapered end of hook 50, in opening 51, when the hook is in its upper position, or direct actuation of' arm 52 when the hook is in its lower position. In order to obtain an operative connection between bell-crank 82 and the case-shitt-frame 77, provision is made of an upwardly-projecting lug 87 on the forward arm 83 of the bell-crank, and this lug is provided with an arcuate slot 87a, described about the pivot 84 of the bell-crank 82 as a center. In this slot extends a pin 88, fixed in the shift-trame 77, the normal position ot the pin in the slot being shown in Fig. l.

Upon actuation of the non-compute lever 70, link 71 will be forced to the rear and disconnector 72 will be swung to the positions shown in Figs. 3 and 4. and interponent 28 thereby moved to ineffective position. At the same time, link 80 will be drawn forwardly and downwardly, and an arm 83 of bell-crank 82 swung upwardly, to lift link 49 and its hook 50, so that the tapered point of hook 50 may move idly in opening 51 of arm 52. It will be seen that excessive movement of bellcrank 82 by link 8O may be avoided, by providing for a certain amount 'of lost motion between pin 81 and the upper end of slot 80a. lWhen the parts are in the,y positions just described, pin 88 will be in substantiall the lower end of slot 87 a, as shown in Figs. 3 and 4. It will be understood that pin 88 may serve to prevent overthrow of bell-crank 82 when the latter is shifted by means of the non-compute lever.

pon actuation of shift-key 78, the shiftframe 77 will be swung to upper-case position, and pin 88, which is normally in enga ement with the up er end of slot 87, wi l cause arm 83 of bel -crank 82 to be lifted, thereby moving link 49 and hook 50 to silence the skipping device. At the same time, pin 8l will be brought into engagement with the lower end of slot 80, and will cause link 80 to swinfr disconnector 72 into position to silence the computin mechanism. It will be seen that, in a dition to the upward swinging ofvarm 83 of bellcrank 82 in this operation, the pivot 84, and consequently the bell-crank 82, will be moved forwardly.

It will be seen that slot 86 is of suiicient len th to permit the forward movement of bel -crank 82, due to movement of the case,- shift-frame, and that in order that the caseshift-frame may be raised to upper-case position without being blocked by link 80, provision is made for lost motion between pin 81 and the lower end of slot 80a, so that, during the first art of the upward movement of the shi t-frame, there will be no effective actuation of link 80, but, when pin 81 engages the lower end of slot 80a, link 80 will be actuated to move disconnector 72 to operative position.

When the skip-producing mechanism is rendered ineffective, the effect of repositioning this mechanism b the back-spacer also becomes ineffective. his is due to the fact that the back-spacer engages that part of the train of mechanism which is farthest away from thetotalizer and beyond the place Where the lost motion is provided.

It will be seen that I employ a stop mein'- ber with only one stop thereon, and that this stop is used for single letter-spacing; that a fixed stop is used for double letter-spacing;

that the shiftable stop member is actuated from the? traveling totalizer; and that its actuation depends on or is controlled by the non-compute mechanism and the case-shift mechanism.

Variations may be resorted to Within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim: c Y

1. The combination 'with a traveling element, of an escapement mechanism for normally controlling step-by-step movements of said traveling element, and traveling element-controlled means for insuring an eXtra space or skipping movement of said escapement mechanism, said traveling element-colitrolled means including a one-way acting dog, acting as a positive interponent for movements of said traveling element in a letter-feeding direction, and yieldingly idle during a return movement of said traveling element.

2. The combination with a traveling element, of an escapement mechanism controlling step-by-step movements of said traveling element, means for modifying the action of said escapement mechanism, to give either regular step-by-step movements or varied step-by-step movements, la linkage connected to operate said modifying means, a oneway acting dog on said linkage, and cams on said traveling element engaging said dog,

to operate said linkage positively during an advancing movementyof said traveling element, and engaging said dog to operate said dogidly while said linkage remains passive v during a return movement of said traveling element.

3. The combination with a traveling element, of an escapement mechanism for said traveling element,- a shiftable obstructing toe for determining the extent of action of said escapement mechanism, and thus the extent of the traveling movement of said traveling element, a train of links and levers connected to shift said obstructing toe, a dog pivoted on one of said levers, a pin limiting the movement of said dog in one direction, a spring yieldingly holding said dog from movement in the opposite direction, and a series of cams arranged at spaced intervals v on said traveling element, so as to come effectively in engagement with said dog during an advancing movement of said traveling element and to click idly ast said dog during a return movement of) said traveling element.

4. The combination with a traveling element, of an escapement mechanism for controlling step by-step movements of said traveling element, obstructing means for determining the extent of movement of said escapement mechanism and Said traveling element, a dog operated from said traveling element in aceitain direction to shift said y obstructing means to vary the action of said escapement mechanism, and means for operating said dog in said same certain direction from a point other than at said travelin element, so as to prevent the operation o said dog by said traveling element, and thus prevent the control of said escapement mechanism from said traveling element.

5. In combination with a traveling element, feeding mechanism for moving said traveling element in one direction, traveling-element-controlled means for modifying the action of said feeding mechanism, a reverse-feeding device for said traveling element, and means controlled by said reversefeeding device for silencing the control of said feeding mechanism from said traveling element.

6. The combination with a traveling element, of an escapement mechanism for controlling the traveling movements of said element, a connection operated during an advancing movement of said traveling element for modifying the action of said escapement mechanism, said connection including a dog acting as a positive interponent during an advancing movement of said traveling element, and yieldingly idle during a return movement of said traveling element, and shifting means to properly position said dog after a return movement, so as to insure said dog acting as a positive interponent in controlling said escapement mechanism subsequent to said return movement.

7. The combination with a traveling element, of an escapement mechanism controlling the travel of said element, a connection from said traveling element to said escapement mechanism, enabling the control of said escapement mechanism from said traveling element, a back-space mechanism for said traveling element, and silencing means for said connection operated from said backspace mechanism.

8. The combination with a traveling element, of an escapement mechanism for said traveling element, an obstructing member cooperating with said escapement mechanism to determine the magnitude of movement of said traveling element, a series of links and levers connected to shift said obstructing member, a dog on one of said levers located in the path of said traveling element. so as to be operated thereby to shift said obstructing member, a back-space mechanism for said traveling element, and means operated from said back-space mechanism for shifting, through said links and levers. said dog out of the path of said traveling element, so as to interrupt the control of said escapement mechanism from said traveling element.

9. The combination with a traveling element, of an escapement mechanism for controlling the movements of said travelin element. an obstruction cooperating wit said escapementmechanism, shifting means for said obstruction including an arm having an opening therein, a link having a hook projecting in said opening, connections enabling the operation of said link from said traveling element, and shifting means for raising said link, so as to withdraw said hook from positive engagement in said opening, and thus silence the control of said eselement 1 0. T he. combination with a traveling element and a variable feed escapement therefor including a loose dog, of a shiftable stop member normally effective to permit singlespace movements of said traveling element, the movement of said shiftable stop member being effected by said traveling element, and a second or fixed stop with which the loose dog on said escapement mechanism coperates to permit double-space movements of said traveling element when the shiftable stop member is in its ineffective position.

11. The combination with a traveling element and feed mechanism therefor, of a case-shift frame,. a traveling-element-controlled device for modifying the action of said feed mechanism, and a disabling means for said traveling-element-controlled device including a lever pivoted on said case-shift frame and having pin-and-slot connections therewith, whereby the disabling means will be actuated by said case-shift frame but may be actuated independently thereof.

12. In a combined typewriting and computing machine. the combination with computing mechanism, a traveling element and feed mechanism for said traveling element, of a traveling-elementcontrolled device for modifying the act-ion of said feed mechanism, a case-shift frame, a disabling lever for said traveling-element-controlled device pivoted on said case-shift frame and having` pin-and-slot connections therewith, whereby the lever will be actuated by said case-shift frame but may be actuated independently thereof, a non-compute device, and means whereby said lever will be actuated by said non-compute device.

13. The combination with a traveling element and a variable feed escapement mechanism therefor, of a shiftable stop member for said escapement mechanism, a train of mechanism engaged by said traveling element and connected to said stop member for shifting the latter at predetermined positions during the travel of said traveling element, and back-spacing mechanism for said4 traveling element, said back-spacing mechanism being effective to reposition said train of mechanism, so that said stop member will be in a position to permit double-space movements of said traveling element after a backspacing operation.

14. The combination with a traveling element and a I'ariable feed escapement therefor, of skip-producing mechanism for said traveling element, case-shift mechanism, and a pivoted element, said pivoted element being controlled by and movable with said ease-shift mechanism to break the connection of said skip-producing mechanism extending from said traveling element to said escapementy mechanism.

15. 'The combination with a traveling element, and a variable feed escapement there# for, of computing mechanism, skip-producing mechanism for said traveling element comprising a train of mechanism, case-shlft mec anism, a pivoted element, said pivoted element being controlled by and movable with said case-shift mechanism to break the connection of said train of mechanism extending from said traveling element to said escapement mechanism, means, including a non-compute key, for rendering said'computin mechanism. ineffective, and means wherei actuation of said non-compute key will e ect a movement of said pivoted element, to break said train of mechanism, independently of said case-shift mechanism.

16. The combination with a traveling element and a variable feed escapement therefor, of a back-spacer for said traveling element, variable-feed-controlling means 'for said escapement effective during the forward feed of said traveling element, but ineffective during the return movement thereof, and a back-spacer-controlled device for resetting said controlling means for the variable feed escapement when said traveling element is back-spaced to a position at which a change in the normal action of the variable feed escapement is effected during the forward feed of said carriage. 17. In combinatlon, a traveling carriage an escapement feed therefor, a device or modifying device and to jyield upon engagement during movement o the carrihge in the opposite direction without actuating said modifying device, a back-spacer for said carriage, and back-spacer-o erated means for resetting said modlfying evice when the carriage is back-spaced to a oint where the action of the escapement feed is modified in the forward movement of the carriage.

18. The combination with a traveling element, of an escapement mechanism for controlling said traveling element, connections operated from said traveling element for controlling its own movement by governing the operation of said escapement mechanism, said connections being automatic, so as to act positively during an advancing movement of said traveling element, and permitting passive normal return movement, back-space mechanism for returning said traveling element, a letter-space at a time, and means for silencing said connections from said back-space mechanism, so as to permit idle return movements of said tra veling element.

19. The combination with a traveling element, of an escapement mechanism for said traveling element, a connection for controlling said escapement mechanism from saidtravehng element lncluding a one-way acting- .including a device to reset the means for varying the action of'the escapement feed when the traveling element is back-spaced to any of said predetermined positions.

21. The combination with a traveling element, of feeding mechanism for effecting step-by-step feeding movements -of said traveling element, traveling-element-con trolled means for causing increased movements of said feeding mechanism when the traveling element is in certain predetermined positions, and means to transmit motion from-said traveling element to said means for causing increased movements of said feedin mechanism, including a one-way dog e ective for movements of said traveling element in one direction and ineffective for movements thereof in the opposite direction.

22. In combination, a traveling element, feed mechanismtherefor, a feed-controlling device for varying the normal action of said feed mechanism, a cam mounted on saidv traveling element, a. dog pivoted on said feed-controlling device, a stop to limit the pivotal movement of said dog in one direction, a springyieldingly pressing said dog against said stop, a. back-spacer, and means actuated by the back-spacer for resetting the dog with reference to the cam upon backspacing the traveling element to the positlon at which the dog was in operative engagement with the cam in the forward movement of the traveling element.

HENRY L. PITMAN.

Witnesses ARTHUR A. JOHNSON, EDITH B. LIBBEY. 

